4D Molecular Therapeutics (FDMT)
4D Molecular Therapeutics on one page: short interest, daily short volume, fails to deliver, planned sales, large holders, 13F holders, earnings dates and insider trades. Listed on Nasdaq, classified by the SEC as biological products, (no diagnostic substances).
11.5M
Short interest
settlement 2026-10-15
12.0
Days to cover
+2.7 days vs prior
66.1%
Short share of volume
2026-11-02
6,973
Fails to deliver
settlement 2026-10-07
Thu 5 Nov
Next earnings
estimated date
-$2.7M
Insider flow, 90 days
0 buys, 10 sells
As of 2026-11-02.
Short interest
FINRA, twice a month. The newest 48 settlements in the table, 48 in the chart. JSONAs of 15 October 2026, short interest in FDMT is 11,530,134 shares, down 478,511 shares over the last month. Over the last 48 readings it ranged from 3,619,133 shares (15 July 2025) to 13,305,097 shares (30 June 2026). At the reported average volume of 961K shares a day that is 12.0 days to cover.
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| Settlement | Shares short | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| 2026-10-15 | 11,530,134 | +2.6% | 960,955 | 12.00 |
| 2026-09-30 | 11,238,611 | -6.4% | 1,204,980 | 9.33 |
| 2026-09-15 | 12,008,645 | -0.5% | 647,409 | 18.55 |
| 2026-08-31 | 12,069,229 | -1.8% | 1,481,002 | 8.15 |
| 2026-08-14 | 12,289,621 | +2.1% | 550,714 | 22.32 |
| 2026-07-31 | 12,038,453 | +5.9% | 680,478 | 17.69 |
| 2026-07-15 | 11,363,434 | -14.6% | 732,623 | 15.51 |
| 2026-06-30 | 13,305,097 | +2.9% | 1,461,960 | 9.10 |
| 2026-06-15 | 12,929,459 | +6.0% | 782,378 | 16.53 |
| 2026-05-29 | 12,191,854 | +0.9% | 872,663 | 13.97 |
| 2026-05-15 | 12,081,925 | +0.8% | 633,230 | 19.08 |
| 2026-04-30 | 11,990,069 | +4.1% | 669,944 | 17.90 |
| 2026-04-15 | 11,519,304 | +6.0% | 707,022 | 16.29 |
| 2026-03-31 | 10,862,832 | +4.5% | 896,609 | 12.12 |
| 2026-03-13 | 10,398,203 | +2.6% | 735,790 | 14.13 |
| 2026-02-27 | 10,132,423 | +4.3% | 670,694 | 15.11 |
| 2026-02-13 | 9,717,883 | +4.7% | 746,966 | 13.01 |
| 2026-01-30 | 9,282,692 | -2.1% | 699,092 | 13.28 |
| 2026-01-15 | 9,479,640 | +9.2% | 845,125 | 11.22 |
| 2025-12-31 | 8,677,770 | +72.7% | 1,473,096 | 5.89 |
| 2025-12-15 | 5,023,933 | -0.5% | 793,586 | 6.33 |
| 2025-11-28 | 5,049,284 | -2.7% | 736,893 | 6.85 |
| 2025-11-14 | 5,188,480 | +21.5% | 1,031,333 | 5.03 |
| 2025-10-31 | 4,271,739 | +1.3% | 980,066 | 4.36 |
| 2025-10-15 | 4,219,162 | -6.0% | 735,599 | 5.74 |
| 2025-09-30 | 4,488,864 | -4.3% | 779,153 | 5.76 |
| 2025-09-15 | 4,691,697 | +9.2% | 559,252 | 8.39 |
| 2025-08-29 | 4,295,623 | +3.7% | 655,621 | 6.55 |
| 2025-08-15 | 4,142,441 | +11.9% | 4,040,836 | 1.03 |
| 2025-07-31 | 3,703,248 | +2.3% | 459,039 | 8.07 |
| 2025-07-15 | 3,619,133 | -6.8% | 332,098 | 10.90 |
| 2025-06-30 | 3,885,430 | -6.9% | 460,765 | 8.43 |
| 2025-06-13 | 4,171,819 | -4.2% | 530,228 | 7.87 |
| 2025-05-30 | 4,352,742 | -6.8% | 396,858 | 10.97 |
| 2025-05-15 | 4,668,859 | -7.4% | 517,013 | 9.03 |
| 2025-04-30 | 5,039,643 | -3.1% | 424,039 | 11.88 |
| 2025-04-15 | 5,200,870 | +2.8% | 995,479 | 5.22 |
| 2025-03-31 | 5,057,335 | +0.6% | 706,355 | 7.16 |
| 2025-03-14 | 5,028,368 | -4.1% | 721,909 | 6.97 |
| 2025-02-28 | 5,241,024 | -15.0% | 601,496 | 8.71 |
| 2025-02-14 | 6,167,568 | -16.6% | 1,323,298 | 4.66 |
| 2025-01-31 | 7,397,347 | -3.6% | 639,933 | 11.56 |
| 2025-01-15 | 7,672,441 | -3.9% | 776,503 | 9.88 |
| 2024-12-31 | 7,986,854 | -10.4% | 1,351,357 | 5.91 |
| 2024-12-13 | 8,917,026 | +4.6% | 588,395 | 15.15 |
| 2024-11-29 | 8,522,668 | +8.9% | 999,899 | 8.52 |
| 2024-11-15 | 7,827,058 | -4.3% | 821,166 | 9.53 |
| 2024-10-31 | 8,182,326 | -13.8% | 741,545 | 11.03 |
Daily short volume
FINRA Reg SHO, the last 30 sessions. JSONAs of 2 November 2026, the short share of FDMT volume is 66.1%, down 2.1 points over the last five sessions. Over the last 30 readings it ranged from 39.1% (28 September 2026) to 81.5% (16 October 2026). The latest reading is 11.4 points above the 30-session average of 54.8%, on 292K shares reported.
| Date | Short volume | Total volume | Short share | Exempt |
|---|---|---|---|---|
| 2026-11-02 | 193K | 292K | 66.1% | 0 |
| 2026-10-30 | 102K | 232K | 44.0% | 0 |
| 2026-10-29 | 95K | 209K | 45.3% | 195 |
| 2026-10-28 | 152K | 356K | 42.8% | 1,200 |
| 2026-10-27 | 153K | 340K | 45.1% | 0 |
| 2026-10-26 | 231K | 338K | 68.2% | 0 |
| 2026-10-23 | 209K | 301K | 69.6% | 0 |
| 2026-10-22 | 183K | 325K | 56.5% | 0 |
| 2026-10-21 | 381K | 619K | 61.7% | 28 |
| 2026-10-20 | 170K | 267K | 63.8% | 0 |
| 2026-10-19 | 123K | 258K | 47.6% | 0 |
| 2026-10-16 | 183K | 224K | 81.5% | 100 |
| 2026-10-15 | 154K | 288K | 53.3% | 0 |
| 2026-10-14 | 124K | 216K | 57.1% | 2 |
| 2026-10-13 | 231K | 315K | 73.2% | 0 |
| 2026-10-12 | 243K | 316K | 76.9% | 2,314 |
| 2026-10-09 | 117K | 284K | 41.1% | 113 |
| 2026-10-08 | 108K | 237K | 45.5% | 0 |
| 2026-10-07 | 104K | 227K | 46.1% | 200 |
| 2026-10-06 | 162K | 357K | 45.3% | 1,504 |
| 2026-10-05 | 324K | 752K | 43.1% | 17 |
| 2026-10-02 | 227K | 325K | 69.9% | 0 |
| 2026-10-01 | 130K | 237K | 54.7% | 1,059 |
| 2026-09-30 | 148K | 349K | 42.3% | 316 |
| 2026-09-29 | 212K | 507K | 41.9% | 0 |
| 2026-09-28 | 276K | 707K | 39.1% | 1,211 |
| 2026-09-25 | 179K | 259K | 69.4% | 7,755 |
| 2026-09-24 | 382K | 777K | 49.1% | 854 |
| 2026-09-23 | 401K | 680K | 59.0% | 0 |
| 2026-09-22 | 154K | 348K | 44.3% | 6,210 |
Fails to deliver
SEC, the last 30 settlement dates with a fail. JSONAs of 7 October 2026, the fails-to-deliver balance in FDMT is 6,973 shares, down 10,062 shares over the last settlement date. Over the last 30 readings it ranged from 6 shares (10 September 2026) to 344,988 shares (1 July 2026). The latest reading sits at the bottom of that range.
| Settlement | Shares failed | Price | Value |
|---|---|---|---|
| 2026-10-07 | 6,973 | $12.56 | $88K |
| 2026-09-24 | 17,035 | $15.00 | $256K |
| 2026-09-18 | 50,000 | $14.68 | $734K |
| 2026-09-10 | 6 | $14.18 | $85 |
| 2026-08-21 | 471 | $16.10 | $8K |
| 2026-08-20 | 1,972 | $16.76 | $33K |
| 2026-08-19 | 467 | $14.72 | $7K |
| 2026-08-18 | 317 | $14.55 | $5K |
| 2026-08-14 | 217 | $11.65 | $3K |
| 2026-08-07 | 105 | $10.55 | $1K |
| 2026-08-06 | 229 | $10.28 | $2K |
| 2026-08-04 | 260 | $10.09 | $3K |
| 2026-07-31 | 1,503 | $10.07 | $15K |
| 2026-07-23 | 1,381 | $10.96 | $15K |
| 2026-07-22 | 136 | $11.38 | $2K |
| 2026-07-20 | 9,797 | $10.99 | $108K |
| 2026-07-17 | 1,390 | $10.84 | $15K |
| 2026-07-16 | 40 | $11.68 | $467 |
| 2026-07-02 | 144,085 | $12.69 | $1.8M |
| 2026-07-01 | 344,988 | $13.30 | $4.6M |
| 2026-06-30 | 963 | $12.88 | $12K |
| 2026-06-26 | 564 | $11.52 | $6K |
| 2026-06-25 | 2,925 | $11.62 | $34K |
| 2026-06-24 | 7,646 | $11.60 | $89K |
| 2026-06-18 | 361 | $9.42 | $3K |
| 2026-06-15 | 1,437 | $8.83 | $13K |
| 2026-06-11 | 4,207 | $8.72 | $37K |
| 2026-06-08 | 2,290 | $8.64 | $20K |
| 2026-06-02 | 21 | $9.71 | $204 |
| 2026-06-01 | 11,789 | $9.91 | $117K |
Insider trades
SEC Form 4, newest first. JSONInsiders at FDMT reported 10 open-market sells worth $2.7M in the last 90 days and no open-market buys. Latest filing: Bizily Scott (Chief Legal Officer) on 2026-10-16.
| Date | Insider | Title | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|---|
| 2026-10-16 | Bizily Scott | Chief Legal Officer | Sell | 2K | $12.84 | $21K | 9K |
| 2026-10-16 | Bizily Scott | Chief Legal Officer | Exercise or conversion | 2K | $4.14 | $7K | 10K |
| 2026-10-05 | Kirn David | See Remarks | Sell | 272 | $13.61 | $4K | 709K |
| 2026-10-05 | Kirn David | See Remarks | Sell | 58K | $12.92 | $750K | 709K |
| 2026-09-16 | Bizily Scott | Chief Legal Officer | Sell | 2K | $13.65 | $22K | 9K |
| 2026-09-16 | Bizily Scott | Chief Legal Officer | Exercise or conversion | 2K | $4.14 | $7K | 10K |
| 2026-09-14 | Kirn David | See Remarks | Sell | 58K | $13.90 | $811K | 767K |
| 2026-09-01 | Bizily Scott | Chief Legal Officer | Sell | 584 | $14.00 | $8K | 9K |
| 2026-09-01 | Bizily Scott | Chief Legal Officer | Exercise or conversion | 584 | $6.49 | $4K | 9K |
| 2026-08-19 | Kirn David | See Remarks | Sell | 26K | $16.42 | $426K | 826K |
| 2026-08-19 | Kirn David | See Remarks | Sell | 43K | $15.36 | $663K | 852K |
| 2026-08-19 | Kirn David | See Remarks | Exercise or conversion | 50K | $4.14 | $207K | 895K |
| 2026-08-17 | Bizily Scott | Chief Legal Officer | Sell | 2K | $12.20 | $20K | 9K |
| 2026-08-17 | Bizily Scott | Chief Legal Officer | Exercise or conversion | 2K | $4.14 | $7K | 10K |
| 2026-08-13 | Bizily Scott | Chief Legal Officer | Sell | 2K | $12.00 | $20K | 9K |
| 2026-08-13 | Bizily Scott | Chief Legal Officer | Exercise or conversion | 2K | $4.14 | $7K | 10K |
| 2026-08-04 | Kirn David | See Remarks | Sell | 27K | $10.23 | $275K | 845K |
| 2026-08-03 | Kirn David | See Remarks | Sell | 12K | $10.05 | $125K | 872K |
| 2026-07-10 | Kirn David | See Remarks | Sell | 442 | $12.84 | $6K | 884K |
| 2026-07-10 | Kirn David | See Remarks | Sell | 15K | $12.01 | $184K | 885K |
| 2026-07-09 | Kirn David | See Remarks | Sell | 43K | $12.87 | $548K | 900K |
| 2026-06-30 | Bizily Scott | Chief Legal Officer | Sell | 7K | $14.00 | $92K | 9K |
| 2026-06-30 | Bizily Scott | Chief Legal Officer | Exercise or conversion | 6K | $6.49 | $37K | 15K |
| 2026-06-30 | Bizily Scott | Chief Legal Officer | Exercise or conversion | 814 | $4.14 | $3K | 9K |
| 2026-06-23 | Bizily Scott | Chief Legal Officer | Sell | 10K | $12.00 | $118K | 9K |
| 2026-06-23 | Bizily Scott | Chief Legal Officer | Exercise or conversion | 10K | $4.14 | $41K | 18K |
| 2026-06-22 | Kirn David | See Remarks | Sell | 115K | $10.47 | $1.2M | 942K |
| 2026-06-01 | Kirn David | See Remarks | Sell | 2K | $10.02 | $19K | 1.1M |
| 2026-03-20 | Gupta Ashoo | VP, Finance and Controller | Sell | 80 | $8.61 | $689 | 47K |
| 2026-03-20 | Gupta Ashoo | VP, Finance and Controller | Exercise or conversion | 221 | price not stated in the filing | not stated | 47K |
| 2026-03-20 | Gupta Ashoo | VP, Finance and Controller | Exercise or conversion | 865 | price not stated in the filing | not stated | 47K |
| 2026-03-20 | Gupta Ashoo | VP, Finance and Controller | Sell | 310 | $8.61 | $3K | 47K |
| 2025-12-20 | Gupta Ashoo | VP, Finance and Controller | Exercise or conversion | 866 | price not stated in the filing | not stated | 47K |
| 2025-12-20 | Gupta Ashoo | VP, Finance and Controller | Sell | 79 | $8.68 | $686 | 46K |
| 2025-12-20 | Gupta Ashoo | VP, Finance and Controller | Exercise or conversion | 220 | price not stated in the filing | not stated | 46K |
| 2025-12-20 | Gupta Ashoo | VP, Finance and Controller | Sell | 310 | $8.68 | $3K | 46K |
| 2025-12-16 | Bizily Scott | Chief Legal Officer | Sell | 2K | $10.90 | $18K | 4K |
| 2025-12-16 | Bizily Scott | Chief Legal Officer | Exercise or conversion | 2K | $4.14 | $7K | 5K |
| 2025-12-12 | THEUER CHARLES | Director | Exercise or conversion | 9K | $1.14 | $11K | 42K |
| 2025-11-17 | Bizily Scott | Chief Legal Officer | Sell | 2K | $10.59 | $17K | 4K |
| 2025-11-17 | Bizily Scott | Chief Legal Officer | Exercise or conversion | 2K | $4.14 | $7K | 5K |
| 2025-10-24 | Bizily Scott | Chief Legal Officer | Sell | 3K | $12.00 | $32K | 4K |
| 2025-10-24 | Bizily Scott | Chief Legal Officer | Exercise or conversion | 1K | $6.49 | $7K | 6K |
| 2025-10-16 | Bizily Scott | Chief Legal Officer | Sell | 2K | $10.17 | $17K | 5K |
| 2025-10-16 | Bizily Scott | Chief Legal Officer | Exercise or conversion | 2K | $4.14 | $7K | 7K |
| 2025-10-09 | Bizily Scott | Chief Legal Officer | Sell | 2K | $10.00 | $24K | 5K |
| 2025-09-23 | Bizily Scott | Chief Legal Officer | Sell | 2K | $8.00 | $19K | 8K |
| 2024-12-09 | RA CAPITAL MANAGEMENT, L.P. | TenPercentOwner | Other transaction | 535K | $0.00 | $0 | 4.6M |
| 2024-11-08 | BVF I GP LLC | Other | Other transaction | 2.4M | price not stated in the filing | not stated | 663K |
| 2024-11-08 | BVF I GP LLC | Other | Other transaction | 240K | price not stated in the filing | not stated | 88K |
| 2024-11-08 | BVF I GP LLC | Other | Other transaction | 3.1M | price not stated in the filing | not stated | 830K |
| 2024-09-16 | Bizily Scott | Chief Legal Officer | Exercise or conversion | 500 | $6.49 | $3K | 7K |
| 2024-09-16 | Bizily Scott | Chief Legal Officer | Sell | 500 | $16.33 | $8K | 7K |
| 2024-08-19 | Bizily Scott | Chief Legal Officer | Sell | 500 | $15.00 | $8K | 7K |
| 2024-08-19 | Bizily Scott | Chief Legal Officer | Exercise or conversion | 500 | $6.49 | $3K | 7K |
| 2024-07-16 | Bizily Scott | Chief Legal Officer | Exercise or conversion | 500 | $6.49 | $3K | 7K |
| 2024-07-16 | Bizily Scott | Chief Legal Officer | Exercise or conversion | 1K | $8.04 | $10K | 9K |
| 2024-07-16 | Bizily Scott | Chief Legal Officer | Sell | 2K | $27.11 | $47K | 7K |
| 2024-07-11 | Bizily Scott | Chief Legal Officer | Exercise or conversion | 2K | $15.78 | $31K | 9K |
| 2024-07-11 | Bizily Scott | Chief Legal Officer | Sell | 2K | $25.00 | $50K | 7K |
| 2024-07-10 | Kirn David | Chief Executive Officer | Sell | 13K | $22.49 | $291K | 1.1M |
| 2024-07-10 | Kirn David | Chief Executive Officer | Exercise or conversion | 1K | $15.78 | $20K | 1.1M |
| 2024-07-10 | Kirn David | Chief Executive Officer | Exercise or conversion | 12K | $14.42 | $168K | 1.1M |
| 2024-07-01 | Bizily Scott | Chief Legal Officer | Exercise or conversion | 3K | $8.04 | $23K | 6K |
| 2024-07-01 | Bizily Scott | Chief Legal Officer | Sell | 4K | $21.36 | $91K | 2K |
| 2024-07-01 | Bizily Scott | Chief Legal Officer | Exercise or conversion | 1K | $6.49 | $9K | 3K |
| 2024-06-24 | Kirn David | Chief Executive Officer | Exercise or conversion | 13K | $14.42 | $186K | 1.1M |
| 2024-06-24 | Kirn David | Chief Executive Officer | Sell | 13K | $23.10 | $299K | 1.1M |
| 2024-06-17 | Bizily Scott | Chief Legal Officer | Exercise or conversion | 1K | $8.04 | $10K | 3K |
| 2024-06-17 | Bizily Scott | Chief Legal Officer | Exercise or conversion | 500 | $6.49 | $3K | 2K |
| 2024-06-17 | Bizily Scott | Chief Legal Officer | Sell | 2K | $23.71 | $41K | 2K |
| 2024-05-16 | Bizily Scott | Chief Legal Officer | Sell | 467 | $25.75 | $12K | 2K |
| 2024-05-16 | Bizily Scott | Chief Legal Officer | Exercise or conversion | 500 | $6.49 | $3K | 2K |
| 2024-05-16 | Bizily Scott | Chief Legal Officer | Exercise or conversion | 1K | $8.04 | $10K | 3K |
| 2024-05-16 | Bizily Scott | Chief Legal Officer | Sell | 1K | $25.34 | $33K | 2K |
| 2024-04-16 | Bizily Scott | Chief Legal Officer | Sell | 2K | $25.74 | $45K | 2K |
| 2024-04-16 | Bizily Scott | Chief Legal Officer | Exercise or conversion | 1K | $8.04 | $10K | 3K |
| 2024-04-16 | Bizily Scott | Chief Legal Officer | Exercise or conversion | 500 | $6.49 | $3K | 2K |
| 2024-04-01 | Bizily Scott | Chief Legal Officer | Exercise or conversion | 2K | $15.78 | $31K | 8K |
| 2024-04-01 | Bizily Scott | Chief Legal Officer | Sell | 8K | $31.78 | $259K | 2K |
| 2024-04-01 | Bizily Scott | Chief Legal Officer | Exercise or conversion | 1K | $6.49 | $9K | 3K |
| 2024-04-01 | Bizily Scott | Chief Legal Officer | Exercise or conversion | 2K | $20.24 | $39K | 10K |
| 2024-04-01 | Bizily Scott | Chief Legal Officer | Exercise or conversion | 3K | $8.04 | $23K | 6K |
| 2024-03-27 | Bizily Scott | Chief Legal Officer | Exercise or conversion | 1K | $25.98 | $39K | 8K |
| 2024-03-27 | Bizily Scott | Chief Legal Officer | Exercise or conversion | 4K | $25.98 | $113K | 6K |
| 2024-03-27 | Bizily Scott | Chief Legal Officer | Sell | 6K | $35.04 | $204K | 2K |
| 2024-03-18 | Bizily Scott | Chief Legal Officer | Exercise or conversion | 500 | $6.49 | $3K | 2K |
| 2024-03-18 | Bizily Scott | Chief Legal Officer | Sell | 2K | $31.27 | $55K | 2K |
| 2024-03-18 | Bizily Scott | Chief Legal Officer | Exercise or conversion | 1K | $8.04 | $10K | 3K |
| 2024-02-27 | Bizily Scott | Chief Legal Officer | Sell | 2K | $30.00 | $57K | 2K |
| 2024-02-27 | Bizily Scott | Chief Legal Officer | Exercise or conversion | 2K | $20.24 | $39K | 4K |
| 2024-02-16 | Bizily Scott | Chief Legal Officer | Exercise or conversion | 1K | $8.04 | $10K | 3K |
| 2024-02-16 | Bizily Scott | Chief Legal Officer | Sell | 2K | $27.67 | $48K | 2K |
| 2024-02-16 | Bizily Scott | Chief Legal Officer | Exercise or conversion | 500 | $6.49 | $3K | 2K |
| 2024-02-08 | Kirn David | Chief Executive Officer | Sell | 92K | $27.13 | $2.5M | 1.1M |
| 2024-02-08 | Bizily Scott | Chief Legal Officer | Sell | 1K | $27.50 | $37K | 2K |
| 2024-02-08 | Bizily Scott | Chief Legal Officer | Exercise or conversion | 1K | $6.49 | $9K | 3K |
| 2024-02-08 | Bizily Scott | Chief Legal Officer | Exercise or conversion | 3K | $8.04 | $23K | 5K |
| 2024-02-08 | Bizily Scott | Chief Legal Officer | Sell | 3K | $27.50 | $80K | 2K |
| 2024-02-08 | Bizily Scott | Chief Legal Officer | Exercise or conversion | 2K | $15.78 | $31K | 4K |
Form 4 filings are due within two business days of the trade. Insiders sell for many reasons that say nothing about the company; open-market buys are rarer.
Planned sales (Form 144)
Newest first. JSON8 Form 144 notices on file for FDMT worth $394K at the prices reported; 2 in the last 90 days worth $99K. Latest: SCOTT BIZILY filed on 2026-08-17 to sell 6,540 shares ($80K) from 2026-08-17.
| Filed | Seller | Shares | Market value | Of outstanding | Sale from | Broker |
|---|---|---|---|---|---|---|
| 2026-08-17 | SCOTT BIZILYOfficer | 7K | $80K | 0.012% | 2026-08-17 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-08-13 | SCOTT BIZILYOfficer | 2K | $19K | 0.003% | 2026-08-13 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-30 | SCOTT BIZILYOfficer | 7K | $85K | 0.013% | 2026-06-30 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-06-23 | SCOTT BIZILYOfficer | 10K | $102K | 0.019% | 2026-06-23 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2025-12-16 | SCOTT BIZILYOfficer | 2K | $18K | 0.003% | 2025-12-16 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2025-11-17 | SCOTT BIZILYOfficer | 2K | $18K | 0.003% | 2025-11-17 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2025-10-24 | SCOTT BIZILYOfficer | 2K | $18K | 0.004% | 2025-10-24 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2025-09-23 | SCOTT BIZILYOfficer | 7K | $54K | 0.016% | 2025-09-23 | Morgan Stanley Smith Barney LLC Executive Financial Services |
Large holders (13D and 13G)
One row per reporting person with its latest filing, newest first. JSON16 holders report 5% or more of FDMT in their latest filing, all on Schedule 13G (passive). The largest reported stake is JANUS HENDERSON GROUP PLC at 10.3% of the class (5,247,151 shares), filed 2026-04-07 for an event on 2026-03-31.
| Filed | Form | Holder | Shares | Of class | Event |
|---|---|---|---|---|---|
| 2026-05-15 | 13G/Ano. 6 | Rajeev Shahparent holding company, individual | 5.1M | 9.9% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 6 | Peter Kolchinskyparent holding company, individual | 5.1M | 9.9% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 6 | RA Capital Management, L.P.investment adviser, partnership | 5.1M | 9.9% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 6 | RA Capital Healthcare Fund, L.P.partnership | 5.1M | 9.9% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 7 | BVF INC/ILcorporation | 5.3M | 10.0% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 7 | LAMPERT MARK Nindividual | 5.3M | 10.0% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 7 | BVF PARTNERS L P/ILinvestment adviser, partnership | 5.3M | 10.0% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 7 | BVF GP HOLDINGS LLCother entity | 5.0M | 9.3% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 7 | BIOTECHNOLOGY VALUE FUND L Ppartnership | 3.9M | 7.3% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 7 | BVF I GP LLCother entity | 3.9M | 7.3% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 7 | BVF II GP LLCother entity | 1.1M | 2.1% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 7 | BIOTECHNOLOGY VALUE FUND II LPpartnership | 1.1M | 2.1% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 7 | BVF Partners OS Ltd.corporation | 289K | 0.6% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 7 | Biotechnology Value Trading Fund OS LPpartnership | 289K | 0.6% | 2026-03-31 |
| 2026-05-12 | 13G | STATE STREET CORPORATIONparent holding company | 2.7M | 5.3% | 2026-03-31 |
| 2026-04-07 | 13G/Ano. 1 | JANUS HENDERSON GROUP PLCparent holding company | 5.2M | 10.3% | 2026-03-31 |
| 2026-03-26 | 13G/Ano. 1 | The Vanguard Groupinvestment adviser | 0 | 0.0% | 2026-03-13 |
| 2026-02-17 | 13G/Ano. 1 | Novo Holdings A/Scorporation | 3.7M | 6.4% | 2025-12-31 |
| 2026-02-09 | 13G/Ano. 2 | THE GOLDMAN SACHS GROUP, INC.parent holding company, corporation | 4.3M | 7.5% | 2025-12-31 |
| 2026-02-09 | 13G/Ano. 2 | GOLDMAN SACHS & CO. LLCbroker-dealer, other entity, investment adviser | 4.3M | 7.5% | 2025-12-31 |
| 2025-10-17 | 13G/Ano. 5 | BlackRock, Inc.parent holding company | 3.1M | 6.6% | 2025-09-30 |
13F holders
Tracked managers holding FDMT at their latest 13F. JSON6 of the 30 tracked managers held FDMT at their latest 13F, $20.4M in total at quarter-end prices. Citadel Advisors is the largest at $9.1M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 5 added shares and 1 cut.
| Fund | Quarter | Shares | Value | Of portfolio | Change in shares |
|---|---|---|---|---|---|
| Citadel Advisors | 2026-06-30 | 688K | $9.1M | 0.00% | +424K |
| Renaissance Technologies | 2026-06-30 | 615K | $8.2M | 0.01% | +36K |
| Two Sigma Investments | 2026-06-30 | 69K | $924K | 0.00% | -55K |
| Fisher Asset Management | 2026-06-30 | 66K | $874K | 0.00% | new |
| AQR Capital Management | 2026-06-30 | 50K | $669K | 0.00% | +5K |
| D. E. Shaw & Co. | 2026-06-30 | 44K | $590K | 0.00% | +20K |
Only the 30 tracked managers on the funds hub; a 13F reports long positions in US listed stock at quarter end, 45 days late, and says nothing about shorts or positions sold since.
What this page is
4D Molecular Therapeutics in the regulatory record
Regulators publish company data in separate files that never sit next to each other: FINRA's twice-monthly short interest, its daily short sale volume, the SEC's fails-to-deliver counts, and each insider's Form 4. A company page puts those series for one ticker on one URL, with planned sales, large holders, 13F holders and financials beside them, so the short position, the daily flow, the settlement fails and what insiders are doing can be read together.
Each section has its own history table, a one-line summary of the latest figures and its own JSON and CSV links, and says when its source last updated.
This page follows 4D Molecular Therapeutics (FDMT), SEC CIK 1650648, listed on Nasdaq, classified by the SEC as biological products, (no diagnostic substances). The cross-market tables live on the short interest and insider transactions hubs.
Source and updates
- Short interest
- FINRA consolidated short interestSource: FINRA.Twice a month, about eight business days after settlement. Latest 2026-10-15.JSON and CSV
- Daily short volume
- FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-11-02.JSON and CSV
- Fails to deliver
- SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-10-07.JSON and CSV
- Planned sales
- SEC EDGAR Form 144Source: SEC.New notices appear shortly after the SEC posts them; a notice is filed on or before the sale. Latest 2026-08-17.JSON and CSV
- Large holders
- SEC EDGAR Schedule 13D and 13GSource: SEC.New filings appear shortly after the SEC posts them. A 13D is due within five business days of crossing 5%; a 13G follows the passive schedule. Latest 2026-05-15.JSON and CSV
- 13F holders
- SEC EDGAR Form 13F-HRSource: SEC.Quarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
- Earnings dates
- SEC EDGAR 8-K filings (Item 2.02)Source: SEC.Twice a day. Reported dates come from the company's 8-K filings; the next date is marked as an estimate until the 8-K arrives. Latest 2026-08-13.JSON and CSV
- Insider trades
- SEC EDGAR Form 4Source: SEC.New filings appear shortly after the SEC posts them; they're due two business days after the trade. Latest 2026-10-16.JSON and CSV
- Company record
- EDGAR filing index for CIK 1650648Ticker, name and exchange from the SEC's company list, refreshed weekly.
- Rate limits
- 10 requests a minute without a key, 30 with a free key from a free account.
How to read it
- Read the position against the flow: rising short interest with a high daily short share is new shorting; rising short interest with a normal short share is old shorts holding on.
- Insider buys next to a large short position are rare and stand out; insider sells next to one are common and mean little.
- Fails to deliver matter relative to the float, not in absolute shares; a million failed shares in a mega cap is noise.
Analysis of what the data shows, not advice. XOOMAR does not recommend buying, selling or holding anything.
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Datasets
Frequently Asked Questions
How much of FDMT is sold short?
11,530,134 shares were held short at the 2026-10-15 settlement, 12.0 days of average volume. FINRA publishes the next count about eight business days after the 15th and the last business day of the month.
What is FDMT's daily short volume?
On 2026-11-02, 193,007 of the 291,773 FDMT shares reported to FINRA were sold short, 66.1% of the day's reported volume. Short volume is a flow for one day, not a position.
Does FDMT have fails to deliver?
The SEC's latest file shows 6,973 FDMT shares failed to deliver at settlement 2026-10-07. Fails are reported per settlement date and published twice a month with a lag.
Are FDMT insiders buying or selling?
Insiders at FDMT reported 10 open-market sells worth $2.7M in the last 90 days and no open-market buys. Latest filing: Bizily Scott (Chief Legal Officer) on 2026-10-16.
Have FDMT insiders filed to sell?
8 Form 144 notices on file for FDMT worth $394K at the prices reported; 2 in the last 90 days worth $99K. Latest: SCOTT BIZILY filed on 2026-08-17 to sell 6,540 shares ($80K) from 2026-08-17.
Who owns 5% or more of FDMT?
16 holders report 5% or more of FDMT in their latest filing, all on Schedule 13G (passive). The largest reported stake is JANUS HENDERSON GROUP PLC at 10.3% of the class (5,247,151 shares), filed 2026-04-07 for an event on 2026-03-31.
Which tracked 13F managers own FDMT?
6 of the 30 tracked 13F managers held FDMT shares at their latest filing, $20.4M in all. The largest: Ken Griffin's Citadel Advisors (688K shares, $9.1M), Renaissance Technologies (615K shares, $8.2M), Two Sigma Investments (69K shares, $924K), Ken Fisher's Fisher Asset Management (66K shares, $874K), Cliff Asness's AQR Capital Management (50K shares, $669K), D. E. Shaw & Co. (44K shares, $590K).
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.